Gm Theftlock

Blew a fuse on my 99 Jimmy on a cold canadian morning. Silly me tried to unlock it. I bought it used a year ago so I thought it might be the default
code. It`s now locked so solid that even the dealer says they have to take it out to fix the problem (can get the unlock codes displayed with 2-3 key presets). Approx $200 Can. Its cheaper to get an aftermarket installed. Does anyone have any other ideas before I suck it up and pay for my mistake? Jeff
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.